Abstract:
A fuel control system, a control unit therefor and methods of making the same are provided, the system (20) comprising a control unit (21) that reduces the length of the warm-up time period of an igniter (28) in subsequent successive burner cycles in which ignition is successful until the control device (21) detects an increase in the length of the flame detecting time period in that particular successive burner cycle over the length of the flame detecting time period on a previous burner cycle at which time the control device (21) then increases the length of the previously reduced warm-up time period a certain amount.
Abstract:
A gas burner having a flame keeper cell and a sensor positioned in the flame keeper cell to assure that a no flame signal is sent to the control system for the burner only when the burner flame is completely extinguished. During initial lighting of the burner or after the burner flame is completely extinguished, the control system attempts ignition only a limited number of times or during a limited time period and then the flow of gas to the burner is stopped thereby presenting excessive gas discharge into the atmosphere.
Abstract:
The present invention relates to a control method for a gas-type clothes dryer. The state of a flame sensor is continuously monitored even after the ignition operation in a gas-type clothes dryer, thereby making it possible to prevent drying from proceeding in an extinguished state where gas is not being smoothly supplied due to malfunctioning in the gas valve.
Abstract:
An oil burner control system is disclosed in which an extended time may be temporarily selected, in situations such as initial set up or periodic maintenance, for priming the pipes, filters and pumps, before a safety lockout of system operation occurs, while otherwise leaving the normal safety lockout functions intact. An igniter in the system operates in an "intermittent" mode during the temporarily selected extended time, and otherwise operates in an "interrupted" mode.
Abstract:
Improved lockout control in oil primary controllers for oil heating systems which allows a reasonable number of user resets and ignition retries in the event of lockout while minimizing the unwanted accumulation of oil in the combustion chamber of the heating system. When the oil primary goes into lockout mode due to failure of combustion to take place, the oil primary is placed in a restricted mode of operation in which a limited number of reset activations and combustion retries may be attempted. If they are unsuccessful, a waiting time interval is then imposed between further successive attempts. The lockout or trial for ignition time may also be reduced for subsequent attempts, to minimize flooding. Normal operation is returned once a successful combustion cycle has been achieved.
Abstract:
An oil burner control system is disclosed in which recycling between a loss of combustion to re-establishment of combustion is limited by counting the number of times recycling occurs and causing a the system to stop recycling and go to lockout after the count reaches a predetermined value.
Abstract:
A hot surface ignition system for a gas furnace, control device therefor, and methods of making the same. The system comprises a burner (22), a thermostat (32), a gas valve (25), a control unit (20') and a hot surface igniter (28). When the control unit (20') has been activated by the thermostat (32) to operate the igniter (28) and the gas valve (25) in a certain sequence, the control unit (20') has a resetting unit (100) for causing the control unit to be reactivated and to repeat the certain sequence of the system when the resetting unit (100) is activated. The resetting unit (100) comprises a manually operated electrical switch (102) that is remote from the thermostat (32) and which must be manually moved to a certain position thereof to activate the resetting unit (100).